[rtl] serial port interrupt handler

[Amit Mookerjee]

Hi  I am trying to write a serial port interrupt handler in RTLinux.  The application that I have  in mind needs to trigger a recording device on the COM2 serial port and  read data from the COM1 serial port.  The logic of my main function is as follows:    startRecord();    <Wait for some event like a keypress or a timeout>    stopRecord();   So I want to install a interrupt handler module and then trigger of the  recording from an user process.  The device I am attached to (an eyetracker)issues 120 interrupts in a  second. When I run my main function after installing the handler I notice  that the handler is just invoked once i.e. after the startRecord() the  process just waits for an event but the interrupt handler is not invoked  even though the device is sending interrupts. The curious fact is that  when I put a startRecord() command in the <void * start_routine(void  *arg)> function of the interrupt handler module the interrupt handler gets invoked as often as interrupts are  received. But when I put a startRecord() command by a getchar() (a button  press) I notice that the handler just gets invoked once.  Does anyone have ideas about what could be going wrong?  Best Wishes Amit